I've seen a lot of IP501 and I've never seen one with a power jack. According to Polycom they all use the cable.
Possibly it was an IP500? -Mike Michael Crown Managing Partner www.thevoipconnection.com 321.989.6728 ext. 611 sip:[EMAIL PROTECTED] > -----Original Message----- > From: Douglas Garstang [mailto:[EMAIL PROTECTED] > Sent: Monday, March 06, 2006 10:13 AM > To: Asterisk Users Mailing List - Non-Commercial Discussion > Subject: RE: [Asterisk-Users] Polycom 501 power over ethernet > > No, some IP 501's have the inline cable and some have the power jack. > > -----Original Message----- > From: Paul Hales [mailto:[EMAIL PROTECTED] > Sent: Sunday, March 05, 2006 8:59 PM > To: Asterisk Users Mailing List - Non-Commercial Discussion > Subject: RE: [Asterisk-Users] Polycom 501 power over ethernet > > > > The IP300/301 has the power jack, the IP500/501 the inline cable. > > PaulH > > On Sun, 2006-03-05 at 20:56 -0700, Douglas Garstang wrote: > > Not true. Some do and some don't. Some have a place to plug > a separate DC adapter, and some have the inline power, where > the adapter plugs into the ethernet cable. Not sure which > ones are newer, and which are older. > > > > -----Original Message----- > > From: Michael Welter [mailto:[EMAIL PROTECTED] > > Sent: Sun 3/5/2006 6:50 PM > > To: Asterisk Users Mailing List - Non-Commercial Discussion > > Cc: > > Subject: Re: [Asterisk-Users] Polycom 501 power over ethernet > > > > > > > > The IP501 does not have a power jack. You'll need one > of the Polycom > > cables. > > > > William M Conlon wrote: > > > My recollection of the marketing fluff was that we > would just use our > > > legacy network (cables) and the devices at both ends > would figure out > > > whether they were sourcing, sinking, or neither. In > the case of the > > > 501, it's the special Polycom cable, either with or > without provision > > > for an AC power adapter, that powers the phone. > That's what I meant by > > > saying the '501' itself is not compliant with 802.3af > -- it needs a > > > separate thingamajig [tech jargon :)]to be powered. > > > > > > Anyway I had hoped that I could just plug a CAT-5 > patch cable from my > > > RJ45 wall outlet into the phone. > > > > > > On Mar 5, 2006, at 5:17 PM, Michael Welter wrote: > > > > > >> As I understand 802.3af, the phones go through a > negotiation with the > > >> unit supplying the power. I don't think it's a > matter of -48VDC on a > > >> particular pair. I remember a schematic from years > ago--it had each > > >> of the receive pair and the transmit pair going into > a transformer > > >> winding, and that winding had a center tap for PoE. > This is not > > >> something that *I* am going to screw with. > > >> > > >> The IP501 telephone set is the same for both PoE and > local power. > > >> With the PoE cable, the 802.3af electronics (the > negotiator) is a > > >> plastic thing in the cable. For the local power, > there is a plastic > > >> thingie toward the wall end of the cable, and you > plug the wall wart > > >> into the plastic thingie. <Notice the advanced > technical jargon here> > > >> > > >> With local power, there is still only one cable one > the desk--the > > >> power plugs into the cable towards the wall. Except > for a power > > >> interruption, this has all the advantages of PoE. > > >> > > >> > > >> > > >> William M Conlon wrote: > > >>> I saw that Polycom offered a cable (not stocked > anywhere), at $40 a > > >>> pop for 802.3af connections. That's what made me > think the phone > > >>> itself is NOT 802.3af compliant. > > >>> Presumably, for $40, there's more than a fuse in > that special cable. > > >>> On Mar 5, 2006, at 4:31 PM, Paul Hales wrote: > > >>>> For Polycom IP500/501's and IP300/301's you need a > special polycom POE > > >>>> cable. > > >>>> > > >>>> When you buy Polycom phones you can usually > specify POE or powerpack. > > >>>> > > >>>> PaulH > > >>>> > > >>>> On Sun, 2006-03-05 at 16:23 -0800, William M Conlon wrote: > > >>>>> When I bought two Polycom 501 SIP phones, I > naively thought they were > > >>>>> Power-over-Ethernet (IEEE 802.3af) because they > were "powered over > > >>>>> ethernet." Silly me. > > >>>>> > > >>>>> Polycom must have some odd voltage or funny way > of injecting the > > >>>>> power, because the POE switch I bought for them > (Netgear [EMAIL PROTECTED]) > > >>>>> won't power them, though if I use the > Polycom-supplied AC adapter and > > >>>>> ethernet power injector cable, they work with the > switch in either > > >>>>> its powered or unpowered ports. > > >>>>> > > >>>>> Anyhow, I hadn't seen any mention of how people > power these phones, > > >>>>> as I had planned on centralizing phone power on a > UPS to supply my > > >>>>> Asterisk server and POE switch. Now the question is: > > >>>>> > > >>>>> Can the Polycom AC-powered injector be used with > a standard ethernet > > >>>>> patch cable: > > >>>>> > > >>>>> switch :: Polycom injector cable :: RJ45 > coupler :: patch cable :: > > >>>>> Polycom 501 > > >>>>> > > >>>>> which would allow me to power the Polycom AC > adapters by my UPS. Or > > >>>>> do I need to provide a UPS at each phone and run > the ethernet like > > >>>>> > > >>>>> switch :: patch cable :: RJ45 coupler :: > Polycom injector cable :: > > >>>>> Polycom 501 > > >>>>> > > >>>>> thanks. > > >>>>> _______________________________________________ > > >>>>> --Bandwidth and Colocation provided by Easynews.com -- > > >>>>> > > >>>>> Asterisk-Users mailing list > > >>>>> To UNSUBSCRIBE or update options visit: > > >>>>> http://lists.digium.com/mailman/listinfo/asterisk-users > > >>>> > > >>>> _______________________________________________ > > >>>> --Bandwidth and Colocation provided by Easynews.com -- > > >>>> > > >>>> Asterisk-Users mailing list > > >>>> To UNSUBSCRIBE or update options visit: > > >>>> http://lists.digium.com/mailman/listinfo/asterisk-users > > >>> Bill > > >>> William M. Conlon, P.E., Ph.D. > > >>> To the Point > > >>> 345 California Avenue Suite 2 > > >>> Palo Alto, CA 94306 > > >>> vox: 650.327.2175 (direct) > > >>> fax: 650.329.8335 > > >>> mobile: 650.906.9929 > > >>> e-mail: mailto:[EMAIL PROTECTED] > > >>> web: http://www.tothept.com > > >>> _______________________________________________ > > >>> --Bandwidth and Colocation provided by Easynews.com -- > > >>> Asterisk-Users mailing list > > >>> To UNSUBSCRIBE or update options visit: > > >>> http://lists.digium.com/mailman/listinfo/asterisk-users > > >> > > >> --Michael Welter > > >> Telecom Matters Corp. > > >> Denver, Colorado US > > >> +1.303.414.4980 > > >> [EMAIL PROTECTED] > > >> www.TelecomMatters.net > > >> _______________________________________________ > > >> --Bandwidth and Colocation provided by Easynews.com -- > > >> > > >> Asterisk-Users mailing list > > >> To UNSUBSCRIBE or update options visit: > > >> http://lists.digium.com/mailman/listinfo/asterisk-users > > > > > > Bill > > > > > > William M. Conlon, P.E., Ph.D. > > > To the Point > > > 345 California Avenue Suite 2 > > > Palo Alto, CA 94306 > > > vox: 650.327.2175 (direct) > > > fax: 650.329.8335 > > > mobile: 650.906.9929 > > > e-mail: mailto:[EMAIL PROTECTED] > > > web: http://www.tothept.com > > > > > > _______________________________________________ > > > --Bandwidth and Colocation provided by Easynews.com -- > > > > > > Asterisk-Users mailing list > > > To UNSUBSCRIBE or update options visit: > > > http://lists.digium.com/mailman/listinfo/asterisk-users > > > > > > > > > > -- > > Michael Welter > > Telecom Matters Corp. > > Denver, Colorado US > > +1.303.414.4980 > > [EMAIL PROTECTED] > > www.TelecomMatters.net > > _______________________________________________ > > --Bandwidth and Colocation provided by Easynews.com -- > > > > Asterisk-Users mailing list > > To UNSUBSCRIBE or update options visit: > > http://lists.digium.com/mailman/listinfo/asterisk-users > > > > > > _______________________________________________ > > --Bandwidth and Colocation provided by Easynews.com -- > > > > Asterisk-Users mailing list > > To UNSUBSCRIBE or update options visit: > > http://lists.digium.com/mailman/listinfo/asterisk-users > > _______________________________________________ > --Bandwidth and Colocation provided by Easynews.com -- > > Asterisk-Users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > > _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
